CryptoPrevent is a tiny utility to lock down any Windows OS (XP, Vista, 7, 8, and 8.1) to prevent infection by the Cryptolocker malware or ransomware, which encrypts personal files and then offers decryption for a paid ransom.

CryptoPrevent artificially implants group policy objects into the registry in order to block certain executables in certain locations from running. The number of rules created by CryptoPrevent is somewhere between 150 and 200+ rules depending on the OS and options selected, not including whitelisting!